Question

Assertion: Reaction of $S{O}_2$ and $H_{2}S$ in the presence of $F{e}_2{O}_3$ catalyst gives elemental sulphur.
Reason: $S{o}_2$ is a reducing agent.

• A. If both assertion and reason are true and the reason is a correct explanation of the assertion
• B. If both assertion and reason are true but reason is not a correct explanation of the assertion
• C. If the assertion is true but reason is false
• D. If both the assertion and reason are false
• E. If the assertion is false but the reason is true

Answer 1

The correct option is C If the assertion is true but reason is false

$2H_{2}S+S{O}_2\to 2H_{2}O+3S\downarrow$

Here $H_{2}S$ is oxidized to sulfur, while $S{O}_2$ is reduced to water. Thus $S{O}_2$ is the oxidizing agent and $H_{2}S$ is a reducing agent.

Therefore assertion is true but the reason is false.